blob: a0127e958389ff3d0b2fdc1596af91287efb94bd [file] [log] [blame]
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/globals.h"
#include "vm/instructions.h"
#include "vm/signal_handler.h"
#include "vm/simulator.h"
#if defined(DART_HOST_OS_LINUX)
namespace dart {
uintptr_t SignalHandler::GetProgramCounter(const mcontext_t& mcontext) {
uintptr_t pc = 0;
#if defined(HOST_ARCH_IA32)
pc = static_cast<uintptr_t>(mcontext.gregs[REG_EIP]);
#elif defined(HOST_ARCH_X64)
pc = static_cast<uintptr_t>(mcontext.gregs[REG_RIP]);
#elif defined(HOST_ARCH_ARM)
pc = static_cast<uintptr_t>(mcontext.arm_pc);
#elif defined(HOST_ARCH_ARM64)
pc = static_cast<uintptr_t>(mcontext.pc);
#elif defined(HOST_ARCH_RISCV32)
pc = static_cast<uintptr_t>(mcontext.__gregs[REG_PC]);
#elif defined(HOST_ARCH_RISCV64)
pc = static_cast<uintptr_t>(mcontext.__gregs[REG_PC]);
#else
#error Unsupported architecture.
#endif // HOST_ARCH_...
return pc;
}
uintptr_t SignalHandler::GetFramePointer(const mcontext_t& mcontext) {
uintptr_t fp = 0;
#if defined(HOST_ARCH_IA32)
fp = static_cast<uintptr_t>(mcontext.gregs[REG_EBP]);
#elif defined(HOST_ARCH_X64)
fp = static_cast<uintptr_t>(mcontext.gregs[REG_RBP]);
#elif defined(HOST_ARCH_ARM)
// B1.3.3 Program Status Registers (PSRs)
if ((mcontext.arm_cpsr & (1 << 5)) != 0) {
// Thumb mode.
fp = static_cast<uintptr_t>(mcontext.arm_r7);
} else {
// ARM mode.
fp = static_cast<uintptr_t>(mcontext.arm_fp);
}
#elif defined(HOST_ARCH_ARM64)
fp = static_cast<uintptr_t>(mcontext.regs[29]);
#elif defined(HOST_ARCH_RISCV32)
fp = static_cast<uintptr_t>(mcontext.__gregs[REG_S0]);
#elif defined(HOST_ARCH_RISCV64)
fp = static_cast<uintptr_t>(mcontext.__gregs[REG_S0]);
#else
#error Unsupported architecture.
#endif // HOST_ARCH_...
return fp;
}
uintptr_t SignalHandler::GetCStackPointer(const mcontext_t& mcontext) {
uintptr_t sp = 0;
#if defined(HOST_ARCH_IA32)
sp = static_cast<uintptr_t>(mcontext.gregs[REG_ESP]);
#elif defined(HOST_ARCH_X64)
sp = static_cast<uintptr_t>(mcontext.gregs[REG_RSP]);
#elif defined(HOST_ARCH_ARM)
sp = static_cast<uintptr_t>(mcontext.arm_sp);
#elif defined(HOST_ARCH_ARM64)
sp = static_cast<uintptr_t>(mcontext.sp);
#elif defined(HOST_ARCH_RISCV32)
sp = static_cast<uintptr_t>(mcontext.__gregs[REG_SP]);
#elif defined(HOST_ARCH_RISCV64)
sp = static_cast<uintptr_t>(mcontext.__gregs[REG_SP]);
#else
#error Unsupported architecture.
#endif // HOST_ARCH_...
return sp;
}
uintptr_t SignalHandler::GetDartStackPointer(const mcontext_t& mcontext) {
#if defined(TARGET_ARCH_ARM64) && !defined(USING_SIMULATOR)
return static_cast<uintptr_t>(mcontext.regs[SPREG]);
#else
return GetCStackPointer(mcontext);
#endif
}
uintptr_t SignalHandler::GetLinkRegister(const mcontext_t& mcontext) {
uintptr_t lr = 0;
#if defined(HOST_ARCH_IA32)
lr = 0;
#elif defined(HOST_ARCH_X64)
lr = 0;
#elif defined(HOST_ARCH_ARM)
lr = static_cast<uintptr_t>(mcontext.arm_lr);
#elif defined(HOST_ARCH_ARM64)
lr = static_cast<uintptr_t>(mcontext.regs[30]);
#elif defined(HOST_ARCH_RISCV32)
lr = static_cast<uintptr_t>(mcontext.__gregs[REG_RA]);
#elif defined(HOST_ARCH_RISCV64)
lr = static_cast<uintptr_t>(mcontext.__gregs[REG_RA]);
#else
#error Unsupported architecture.
#endif // HOST_ARCH_...
return lr;
}
void SignalHandler::Install(SignalAction action) {
struct sigaction act = {};
act.sa_handler = NULL;
act.sa_sigaction = action;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART | SA_SIGINFO;
int r = sigaction(SIGPROF, &act, NULL);
ASSERT(r == 0);
}
void SignalHandler::Remove() {
// Ignore future SIGPROF signals because by default SIGPROF will terminate
// the process and we may have some signals in flight.
struct sigaction act = {};
act.sa_handler = SIG_IGN;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
int r = sigaction(SIGPROF, &act, NULL);
ASSERT(r == 0);
}
} // namespace dart
#endif // defined(DART_HOST_OS_LINUX)